First, there isn't any known rule or law guiding how merit should be used or sent around the forum, there isn't any rule forbidding or stating that two or more parties can not merit themselves if their posts are worthy of it, so personally, I see nothing wrong as long as their post are worthy of the merit(s) they received.

And secondly, I support what _blackStar said, this post does not belong here, it should be in the reputation board, so I suggest you try and move it before a moderator does.